What is the definition of chiral spin liquid? Especially what does chiral mean here? I encounter a lot of terminologies with chiral. It seems they mean differently in different contexts. If you could generally answer what chiral means, it would be great.
A 2D chiral spin liquid (CSL) is a spin liquid state that breaks time-reversal and parity symmetries. For a CSL system with open boundaries, there may be chiral edge states propagate in only one direction, which is analogous to the case of integer quantum Hall effect.
Generally speaking, I think chiral, in a sense, means a particular direction, which is usually associated with broken time-reversal symmetry.